Better…I do not think you can use the word “better” to describe most amplifiers. I would use different. Which one is “better” or appeals to your tastes will have to be judged in your system.
In general terms:
The Belles is considered tube like, nice relaxed open mid range, bass might lack depth (compared to some), detailed but non-irritating high-end, not hugely powerful.
The Aragon is considered powerful (lots of amperage), good base control, considered “dark” by some, highs are extended and leaning toward vivid/detailed/white.
Personally the Belles is a great deal of amp for the price, it bettered a McCormack in some ways, and a Krell in some ways in my system. You will have to make your own choice, in your system
In general terms:
The Belles is considered tube like, nice relaxed open mid range, bass might lack depth (compared to some), detailed but non-irritating high-end, not hugely powerful.
The Aragon is considered powerful (lots of amperage), good base control, considered “dark” by some, highs are extended and leaning toward vivid/detailed/white.
Personally the Belles is a great deal of amp for the price, it bettered a McCormack in some ways, and a Krell in some ways in my system. You will have to make your own choice, in your system